Indigenous protesters are gathering in Brazil ahead of the Cop30 climate summit, where a contentious debate over the definition of 'gender' is unfolding. Conservative states are advocating for a narrow definition that equates gender with biological sex, which could hinder efforts to address gender inequality in climate action. Advocates argue that this shift would reverse years of progress in recognizing diverse gender identities. The summit aims to establish a gender action plan to ensure women's experiences are included in climate policy. However, the pushback from conservative governments complicates these discussions, as many countries seek to broaden the definition to include all gender identities. The implications of this debate are significant, as climate change disproportionately affects women, making it crucial to incorporate their perspectives in climate strategies.